A type of arthritis that primarily affects the spine and sacroiliac joints. Tendons and ligaments may become inflamed where they attach to the bone. Advanced forms may result in formation of bony bridges, causing stiffness and spinal rigidity. An inflammatory arthritic disorder that affects males more often than females. Affected individuals are usually HLA B27 positive.
ouch my back hurts lots and lots lets smoek some weed
by bean October 19, 2004

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×